Dual pressure attachment for pumps



`une 6, 1961 J. SCHIPPER DUAL PRESSURE ATTACHMENT FOR PUMPS Filed Jan. 27, 1958 2 Sheets-Sheet 1 ATTORNEYS June 6, 1961 J. SCHIPPER DUAL PRESSURE ATTACHMENT FOR PUMPS 2 Sheets-Sheet 2 Filed Jan. 27, 1958 1N VEN TOR. JAMES SCH/PPE?? @Mu/M AT 7' ORNE YS United States Patent YFiled Jan. 27, 1958, Ser. No. 711,377 9 Claims. (Cl. 103.-'10) This invention relates in general to pumps and, more particularly, to an attachment for a pump that can be readily converted so that the pump can produce-different ,discharge pressures.

In certain prior art devices of this Vgeneral type, in -order to convert the pump to produce different discharge pressures, it was n ecessaryvto. disassemble the pump and either remove or add certain parts. As a result a considerable amount of trouble and delay was necessary t effectthe conversion.

The present invention provides a feed attachment for a pump through which the iluidV supply is introduced kand which attachment can be easily reversed to provide different feed characteristics to the pump.

More particularly, the invention contemplates a feed attachment for a pump which may be reversed from one position to another to provide either a jet feed to boost the output of the pump or a direct feed where the jet isby-passed and which results in normal operation of the Pump- ,"lhe above attachment finds particular utility when used with a centrifugal type-pump.

Generally, the invention provides an improved dual pressure pump.

Other objects and advantages will appear hereinafter as this disclosure progresses, reference being had to the accompanying drawings, in which:

FIGURE l is a side elevational view, partially in section, of the invention as applied to a centrifugal pump for jet feed operation.

FIG. 2 is a cross sectional View taken online 2 2 of FIGURE 1;

FIG. A3 is a fragmentary side elevational view of the pump, showing the inlet attachment in the normal pump Y operating position; and

FIG. 4 is a cross sectional view taken on line 4-4 of FIGURE l.

vReferringin greater detail to the drawings, the pump -5 is of the centrifugaltype and has Ya housing or casing A6 and an adapter 7 in which the drive shaft-.8 is rotatably mounted. A shaft oil `seal 9 is provided between the .engine :1 1 and a-shaft water seal 10 is provided between .the housing .6 .andshaft The shaft 8 is driven by a power source which is shown here as Van internal-combustion engine 11. The housing 6 is rigidlysecured to the engine 11 by bolt means 12 Aand theassembly is in turn mounted `on a support frame-13 by bolt means 14.

.The single suction pump shown for illustration includes the impeller "15 which is secured to shaft 8 for rotation thereby. The impcller has circumferentially spaced blades v16 which impart pressure and kinetic energy `to the fluid pumped and direct it into thecasing 6.

The pump suction inlet is dened by the circular opening 17 in the side wall of casing 6 and which is in alignment with opening 18 in the central portion of the diffuser member 19. The diffuser has the Vconventional guide vanes 2li through which the uid passes into the discharge chamber 21 for ultimate discharge from thepump via discharge i Port 2.2.

The side wall y2?) of the casing has another opening 2.4 lerterldiug therethroughand a.furshedmounting Sur- `tese .25 edits Outer Side- A .feed attachment 27 is located on the side of the pump through which fluid passes before entering Ythe pump casing y6. This feed attachment is selectively positionable to provide different types of fluid `feed into the pump, to thereby permit the pump to deliver different discharge pressures.

The feed attachment 27 comprises a feed casing 2,8 Whichhas a iiange 29 that together with the sealing gasket 31 abuts against and is secured to surface 25 by thefour bolts v30 which may be permanently secured in thercasing 6. Nuts 32 are tightened to rigidly secure theattahment to the pump and areremoved when it is desired to reverse the attachment. In other words, the spacing 4of the bolts 30 is such as to permit the assembly ofcasing 28 -to casing 6 in either of the positions shownin FIG- URE 1 or 3. It will be noted that the flange 29 Ais relatively wide.

The feed casing 28 has a fluid inlet conduit 33 threadably engaged therein and containing 'an inlet valve `34 which admits supply uid into the upper chamber 35 of the casing.

The feed casing includes an integrally formedinner portion 36 which divides the casing into the upper fluid intakechamber 35 and a lower pressure chamberw. The portion 3 6 is formed by divider Walls 36a and r36h yand defines a jet feed outlet 37 adapted to be in registry with the pump suction inlet 17. The portion 36 has a Venturi-shaped sleeve 39 threadably engaged therein. The dischargeend of the sleeve 39 is adjacent to the jet feed outlet 37. Thus the sleeve 39 forms a passage between the intake chamber 35 Vand the pump inlet 17.

Portion 36 also supports a nozzle 40 whichis threadably secured in connecting Wall 48a and whichextends into the combining section 41 of the venturi sleeve39. Chamber 3S places the nozzle incuid communication with the pump Vdischargechamber 21 via the opening 24. Supply fluid from chamber 3S enters the venturi sleeve via the space 42 between the nozzle and the sleeve.

When the feed casing 28 is in the position shown in FIGURE l, the feed attachment functions as a jet feed for the pump as follows. The normal feed passage 44 is blocked by the pump and, therefore, is inoperative. The supply fluid fromechamber 35 passes through annular space 42, sleeve-39 and is thrown by the impeller into the discharge chamber 21. A portion of the pressure fluid in chamber 21 then passes through port 24, into lower chamber 38 and through nozzle 40. This stream or jet of fluid pressure that is then directed through the venturi `sleeve tends to drive or carry the contiguous particles of lluid, which enter from chamber 35, along with it. Thus, in this position, the jet feed serves to boost the output of the pump, providing a high pressure jet pump.

When the feed casing 28 is inverted from the position shown in FIGURE l and fastened to casing 6 as shown in FIG. 3, the normal feed opening 44 in the casing 28 is then in registry with inlet opening 17 of the pump housing. The jet feed passage including the venturi sleeve 39 and chamber 38 are then sealed or blocked by the surface 25 of the pump. The wide portion 29 of the flange blocks the por-t 24. When the `attachment is in this position, supply uid passes directly from conduit 33 and into the pump and normal operation thereof then takes place and the pump delivers lluid at a lower pressure.

In order to effect the change between normal feed and jet feed, it is only necessary to remove nuts 32 and rotate casing 28 to the desired position. There is no-need to otherwise alter the structure or add or remove baille plates or other parts. The changeover is easily and quickly accomplished and there are no parts to get out of adjustment to become lost.

Various modes of carrying out the invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.

I claim:

l. An attachment adapted to be secured to a fluid pump selectively in one of at least two positions,- said attachment comprising, a pump feed casing having a said casing having a normal feed outlet which is adapted Ato be blocked by said pump when said attachment is in said one position, and when said attachment is in the other of said positions said normal feed outlet is adapted to be in registry with said pump inlet and both the jet feed outlet and pressure chamber are adapted to be blocked by said pump whereby a normal feed thereto is provided.

2. An attachment adapted to be secured selectively in different positions to a fluid pump having a fluid inlet and a discharge outlet comprising, a feed casing having separate inlet and pressure chambers, a venturi sleeve in uid receiving communication with said inlet chamber through which supply liuid may pass into the inlet of the pump when said attachment is in one position, a nozzle between said pressure chamber and said sleeve and in communication with the discharge outlet of said pump via said pressure chamber when said attachment is in said one position whereby pressure iluid passes through said pressure chamber and is directed into said sleeve for a jet feed effect, said casing also having a normal feed outlet from said inlet chamber and which is adapted to be blocked by said pump when said attachment is in said one position, and said normal feed outlet being adapted to be in registry with the inlet of said pump and said jet feed outlet and said pressure chamber being adapted to be blocked by said pump when said attachment is in the other of said positions to thereby provide a normal feed to said pump.

3. A reversible attachment adapted to be secured to a uid pump selectively in one of at least two positions, said attachment comprising, a pump feed casing having a fluid inlet chamber and a separate pressure chamber, a jet feed outlet in said casing adapted to be in communication with an inlet side of said pump when said attachment is in one of said positions, a Venturi sleeve between said inlet chamber and said jet feed outlet through which supply fluid may pass, a jet nozzle between said pressure chamber and said sleeve and adapted the inlet of said pump and said normal feed passage is blocked by the casing of said pump, or a normal feed position in which said normal feed passage is in fluid delivering communication with the inlet of said pump and said jet feed passage means in blocked by the casing of said pump. l

5. In combination with a fluid pump having a casing provided with a supply inlet and also a port. from its discharge side, a feed attachment having a normal feed passage and also jet feed passage means extending therethrough, said attachment securable to said pump in either a jet feed position in which said jet feed passage means is in registry with both said supply inlet and said -port and in which said normal feed passage is blocked by the casing of said pump, or a normal feedposition in which said normal feed passage is in registry with said supply inlet and in which said iet feed passage means and said port are blocked by said casing and said 'feed attachment, respectively.

6. A dual pressure centrifugal pump unit comprising in combination; a pump having a mounting surface with a fluid inlet and a tiuid pressure port therethrough; a feed attachment securable to said surface selectively in a jet feed or normal feed position, said attachment having a tiuid inlet chamber and a pressure chamber, a jet passageway in communication with said inlet chamber and positioned to discharge fluid into said pump inlet when said attachment is in said jet feed position, a jet nozzle between said pressure chamber and said passageway and in communication with said pump via said pressure port and said pressure chamber when said attachmentvis in "said jet feed position whereby pressure liuid is directed to be in communication with a discharge side of said pump when said attachment is in said one position whereby pressure tiuid passes through said pressure chamber and is directed into said sleeve for a jet feed effect, said casing having a normal feed outlet which is adapted to be blocked by said pump when said attachment is in said one position, said normal feed outlet adapted to be in registry with the inlet side of said pump when said attachment is in the other of said positions at which time said iet feed and said pressure chamber are adapted to be blocked by said pump whereby a normal feed to said pump can be provided.

4. In combination with a ud pump having a casing provided with a supply inlet and a discharge outlet, a feed attachment having a normal feed passage and also jet feed passage means extending therethrough, and said attachment being rotatably securable to said pump in either a jet feed position in which said jet feed passage means is in fluid delivering communication with by said nozzle into said passageway fora jet feed of fluid, said attachment also having anormal feed outlet which is blocked by said surface when said attachment is vin said jet feed position; said normal feed outlet being in registry with said pump inlet when said attachment is in said normal feed position at which time said passageway and pressure chamber are blocked by said surface.

7. A dual pressure pump unit comprising in combination; a pump having a mounting surface with a fluid inlet and a duid pressure port therethrough; a feed attachment detachably secured to said surface in either a jet feed or normal feed position, said attachment having a uid inlet chamber and a pressure chamber, a venturi sleeve in communication with said inlet chamber and positioned to discharge uid into said pump inlet when said attachment is in said jet feed position, a jet nozzle between said pressure chamber and said sleeve and in communication with said pump via said pressure port and said pressure chamber when said attachment lis in said jet feed position whereby pressure fluid is directed by said nozzle into said sleeve for a jet feed of uid, said attachment also having a normal feed outlet which is blocked by said surface when said attachment is in said jet feed position', said normal feed outlet being in registry with said pump inlet when said attachment is in said normal feed position at which time said sleeve and pressure chamber are blocked by said surface and said pressure port is blocked by said attachment.

8. As an article of manufacture, an attachment adapted to be secured to a uid pump selectively in a normal feed or a jet feed position, said pump having a housing provided with a fluid supply inlet, jet feed passage and a fluid discharge outlet, said attachment comprising, a casing having a fluid inlet chamber and a separate pressure cham- Vber, a venturi sleeve in said casing and disposed in liuid jet feed position, a jet nozzle disposed between said pressure chamber and said venturi sleeve whereby fluid can pass from the jet feed passage of the pump through said pressure chamber and is directed into the venturi sleeve for a jet feed effect, and said casing also having a normal feed outlet communicating with the uid inlet chamber and spaced from said venturi sleeve, said normal feed outlet adapted to be blocked by the pump housing when the attachment is in the jet feed position and said normal `feed outlet being in registry with the supply inlet of said pump housing when the attachment is in the normal feed position at which time said jet feed outlet and said pressure chamber are adapted to be blocked by said pump housing whereby a normal feed to the pump is provided.

9. The structure of claim 8 and including means connected to said casing for blocking the jet feed passage of the pump when the attachment is disposed in the normal feed position.

References Cited in the tile of this patent UNITED STATES PATENTS 972,846 Fusch Oct. 18, 1910 2,625,797 Poort et al Jan. 20, 1953 2,634,680 Schleyer Apr. 14, 1953 UNITED STATES PATENT oEEICE CERTIFICATE OF CORRECTION Patent No. 2,987,002 June 6, 1961 James Schipper It is hereby certified that error appears in the above numbered pat--y ent requiring correction and that the said Letters Patent should read as corrected below y Column 3, line 66, after "feed" insert outlet column 1, line 5, for "in" read is Signed and sealed this 17th day of October 1961.,

(SEAL) Attest:

ERNEST W. SWIDER I DAVID LADD Attesting Officer Commissioner of Patenw 

